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# Ann’s tree is 76 inches tall and is growing at a rate of 3.6

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Ann’s tree is 76 inches tall and is growing at a rate of 3.6 [#permalink]  08 Oct 2020, 04:41
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Question Stats:

71% (01:06) correct 28% (01:15) wrong based on 7 sessions
Ann’s tree is 76 inches tall and is growing at a rate of 3.6 inches per year. Bob’s tree is 58 inches tall and is growing at a rate of 4.8 inches per year. In how many years will Bob’s tree reach Ann’s tree in height?

A. 12

B. 14

C. 15

D. 20

E. 25
[Reveal] Spoiler: OA

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Re: Ann’s tree is 76 inches tall and is growing at a rate of 3.6 [#permalink]  08 Oct 2020, 07:19
1
KUDOS
let it be x years

ann's tree height after x years =76+3.6x

bob's tree height after x years =58+4.8x

after x years given height of two trees are equal

76+3.6x = 58+4.8x
18=1.2x
x=15
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Re: Ann’s tree is 76 inches tall and is growing at a rate of 3.6   [#permalink] 08 Oct 2020, 07:19
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